Touch Type Electrophoretic Display Apparatus

1. A touch type electrophoretic display apparatus, comprising: at least one photo-controlled voltage source generating at least one reference voltage according to the intensity of environmental light, wherein the level of said reference voltage gets lower/higher as the intensity of environmental light increases/decreases; and a plurality of photo sensing circuits, each of said photo sensing circuits comprising: a photo transistor, having a first gate terminal, a first channel terminal, and a second channel terminal, said first gate terminal coupled to a turn-off voltage, said first channel terminal coupled to a supply voltage, and said photo transistor generating a channel current according to an incident light, wherein said channel current gets larger/smaller as the intensity of said incident light increases/decreases; a light intensity storing capacitor, having a first electrode and a second electrode, said first electrode of said light intensity storing capacitor is coupled to said second channel terminal of said photo transistor and said second electrode of said light intensity storing capacitor is coupled to said at least one photo-controlled voltage source and receiving said at least one reference voltage, and said light intensity storing capacitor used for integrating said channel current to generate a photo sensing voltage at said first electrode; and an output switch, having a second gate terminal, a third channel terminal, and a fourth channel terminal, said output switch is coupled to two electrical components consisting of said light intensity storing capacitor and said photo transistor, said second gate terminal coupled to an output scan voltage, said third channel terminal of said output switch has couplings consisting of two couplings being said third channel terminal of said output switch is coupled to said first electrode of said light intensity storing capacitor and said second channel terminal of said photo transistor, and said fourth channel terminal used for providing an output signal; wherein, when the intensity of the environmental light decreases, the reference voltage provided by the at least one photo-controlled voltage source to the photo transistor of a corresponding photo sensing circuit of the plurality of photo sensing circuits is increased to be an increased reference voltage, and when the intensity of the environmental light increases, the reference voltage provided by the at least one photo-controlled voltage source to the photo transistor of the corresponding photo sensing circuit of the plurality of photo sensing circuits is decreased to be an decreased reference voltage; wherein the photo-controlled voltage source provides the increased reference voltage and the decreased reference voltage to the photo transistor of the corresponding photo sensing circuit of the plurality of photo sensing circuits as the intensity of environmental light decreases and increases, respectively; wherein said at least one photo-controlled voltage source including an output terminal connected to said third channel terminal of said output switch through said second electrode of said light intensity storing capacitor and having no terminal directly connected to said third terminal of said output switch.

2. The touch type electrophoretic display apparatus as claim 1 , further comprising a plurality of pixel driving circuits, each of said pixel driving circuits comprising a transistor, used as a pixel switch for storing a source voltage on a pixel capacitor under the control of a gate voltage, to determine the grey level of a pixel of an electrophoretic display layer.

3. A touch type electrophoretic display apparatus, comprising: a photo-controlled voltage source generating a reference voltage according to the intensity of environmental light, wherein the level of said reference voltage gets lower/higher as the intensity of environmental light increases/decreases; and a plurality of photo sensing circuits, each of said photo sensing circuits comprising: a photo transistor, having a first gate terminal, a first channel terminal, and a second channel terminal, said first gate terminal coupled to a turn-off voltage, said first channel terminal coupled to a supply voltage, and said photo transistor generating a channel current according to an incident light, wherein said channel current gets larger/smaller as the intensity of said incident light increases/decreases; a light intensity storing capacitor, having a first electrode and a second electrode, said first electrode of said light intensity storing capacitor is coupled to said second channel terminal of said photo transistor and said second electrode of said light intensity storing capacitor is coupled to said at least one photo-controlled voltage source and receiving said at least one reference voltage, and said light intensity storing capacitor used for integrating said channel current to generate a photo sensing voltage at said first electrode; and an output switch, having a second gate terminal, a third channel terminal, and a fourth channel terminal, said output switch is coupled to two electrical components consisting of said light intensity storing capacitor and said photo transistor, said second gate terminal coupled to an output scan voltage, said third channel terminal of said output switch has couplings consisting of two couplings being said third channel terminal of said output switch is coupled to said first electrode of said light intensity storing capacitor and said second channel terminal of said photo transistor, and said fourth channel terminal used for providing an output signal; wherein, when the intensity of the environmental light decreases, the reference voltage provided by the at least one photo-controlled voltage source to the photo transistor of a corresponding photo sensing circuit of the plurality of photo sensing circuits is increased to be an increased reference voltage, and when the intensity of the environmental light increases, the reference voltage provided by the at least one photo-controlled voltage source to the photo transistor of the corresponding photo sensing circuit of the plurality of photo sensing circuits is decreased to be an decreased reference voltage; wherein the photo-controlled voltage source provides the increased reference voltage and the decreased reference voltage to the photo transistor of the corresponding photo sensing circuit of the plurality of photo sensing circuits as the intensity of environmental light decreases and increases, respectively; wherein said at least one photo-controlled voltage source including an output terminal connected to said third channel terminal of said output switch through said second electrode of said light intensity storing capacitor and having no terminal directly connected to said third terminal of said output switch.

4. The touch type electrophoretic display apparatus as claim 3 , further comprising a plurality of pixel driving circuits, each of said pixel driving circuits comprising a transistor, used as a pixel switch for storing a source voltage on a pixel capacitor under the control of a gate voltage, to determine the grey level of a pixel of an electrophoretic display layer.

5. A touch type electrophoretic display apparatus, comprising: a plurality of pixel driving circuits, each of said pixel driving circuits comprising a transistor, used as a pixel switch for storing a source voltage on a pixel capacitor under the control of a gate voltage, to determine the grey level of a pixel of an electrophoretic display layer; at least one photo-controlled voltage source generating at least one reference voltage according to the intensity of environmental light, wherein the level of said reference voltage gets lower/higher as the intensity of environmental light increases/decreases; and a plurality of photo sensing circuits, each of said photo sensing circuits comprising: a photo transistor, having a first gate terminal, a first channel terminal, and a second channel terminal, said first gate terminal coupled to a turn-off voltage, said first channel terminal coupled to a supply voltage, and said photo transistor generating a channel current according to an incident light, wherein said channel current gets larger/smaller as the intensity of said incident light increases/decreases; a light intensity storing capacitor, having a first electrode and a second electrode, said first electrode of said light intensity storing capacitor is coupled to said second channel terminal of said photo transistor and said second electrode of said light intensity storing capacitor is coupled to said at least one photo-controlled voltage source and receiving said at least one reference voltage, and said light intensity storing capacitor used for integrating said channel current to generate a photo sensing voltage at said first electrode; and an output switch, having a second gate terminal, a third channel terminal, and a fourth channel terminal, said output switch is coupled to two electrical components consisting of said light intensity storing capacitor and said photo transistor, said second gate terminal coupled to an output scan voltage, said third channel terminal of said output switch has couplings consisting of two couplings being said third channel terminal of said output switch is coupled to said first electrode of said light intensity storing capacitor and said second channel terminal of said photo transistor, and said fourth channel terminal used for providing an output signal; wherein, when the intensity of the environmental light decreases, the reference voltage provided by the at least one photo-controlled voltage source to the photo transistor of a corresponding photo sensing circuit of the plurality of photo sensing circuits is increased to be an increased reference voltage, and when the intensity of the environmental light increases, the reference voltage provided by the at least one photo-controlled voltage source to the photo transistor of the corresponding photo sensing circuit of the plurality of photo sensing circuits is decreased to be an decreased reference voltage; wherein the photo-controlled voltage source provides the increased reference voltage and the decreased reference voltage to the photo transistor of the corresponding photo sensing circuit of the plurality of photo sensing circuits as the intensity of environmental light decreases and increases, respectively; wherein said at least one photo-controlled voltage source including an output terminal connected to said third channel terminal of said output switch through said second electrode of said light intensity storing capacitor and having no terminal directly connected to said third terminal of said output switch.